How to plot the values found in a for loop?

Question

Nick Kavouris 2020-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/599272-how-to-plot-the-values-found-in-a-for-loop

评论： David Hill 2020-9-24

I have the following code

for g=((-3*pi())/2):0.1:0

Ebca=X*(Ex*cos((pi()/6)+g)^2+Ey*sin((pi()/6)+g)^2+Gamxy*sin((pi()/6)+g)*cos((pi()/6)+g))

Ebcb=Ex*cos(-(pi()/6)+g)^2+Ey*sin(-(pi()/6)+g)^2+Gamxy*sin(-(pi()/6)+g)*cos(-(pi()/6)+g);

Ebcc=Ex*cos((pi()/2)+g)^2+Ey*sin((pi()/2)+g)^2+Gamxy*sin((pi()/2)+g)*cos((pi()/2)+g);

end

I need to plot each Ebca, Ebcb, Ebcc value found in the loop with respect to g, how would i do this?

I know i need to create an array with the values found for each function with each value of g but I do no know how to do this.

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Answer 1

David Hill 2020-9-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/599272-how-to-plot-the-values-found-in-a-for-loop#answer_499897

在 MATLAB Online 中打开

Are X, Ex, Ey, Gamxy constants not listed? Recommned executing without loop; otherwise you need to index Ebca/Ebcb/Ebcc. Currently you are overriding them during each loop execution.

g=-3*pi/2:0.1:0
Ebca=X*(Ex*cos((pi/6)+g).^2+Ey*sin((pi/6)+g).^2+Gamxy*sin((pi/6)+g).*cos((pi/6)+g));
Ebcb=Ex*cos(-(pi/6)+g).^2+Ey*sin(-(pi/6)+g).^2+Gamxy*sin(-(pi/6)+g).*cos(-(pi/6)+g);
Ebcc=Ex*cos((pi/2)+g).^2+Ey*sin((pi/2)+g).^2+Gamxy*sin((pi/2)+g).*cos((pi/2)+g);
plot(g,Ebca,g,Ebcb,g,Ebcc);

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Nick Kavouris 2020-9-24

在 MATLAB Online 中打开

these constants were found in an earlier part of the code

Here is the full code to this part

%% Part E
for g=(pi()/3)
Eaa=Ex*cos((pi()/6)+g)^2+Ey*sin((pi()/6)+g)^2+Gamxy*sin((pi()/6)+g)*cos((pi()/6)+g);
Eab=Ex*cos(-(pi()/6)+g)^2+Ey*sin(-(pi()/6)+g)^2+Gamxy*sin(-(pi()/6)+g)*cos(-(pi()/6)+g);
Eac=Ex*cos((pi()/2)+g)^2+Ey*sin((pi()/2)+g)^2+Gamxy*sin((pi()/2)+g)*cos((pi()/2)+g);
end
for g=(-pi()/6)
Eba=Ex*cos((pi()/6)+g)^2+Ey*sin((pi()/6)+g)^2+Gamxy*sin((pi()/6)+g)*cos((pi()/6)+g);
Ebb=Ex*cos(-(pi()/6)+g)^2+Ey*sin(-(pi()/6)+g)^2+Gamxy*sin(-(pi()/6)+g)*cos(-(pi()/6)+g);
Ebc=Ex*cos((pi()/2)+g)^2+Ey*sin((pi()/2)+g)^2+Gamxy*sin((pi()/2)+g)*cos((pi()/2)+g);
end
for g=(pi()/2)
Eaba=Ex*cos((pi()/6)+g)^2+Ey*sin((pi()/6)+g)^2+Gamxy*sin((pi()/6)+g)*cos((pi()/6)+g);
Eabb=Ex*cos(-(pi()/6)+g)^2+Ey*sin(-(pi()/6)+g)^2+Gamxy*sin(-(pi()/6)+g)*cos(-(pi()/6)+g);
Eabc=Ex*cos((pi()/2)+g)^2+Ey*sin((pi()/2)+g)^2+Gamxy*sin((pi()/2)+g)*cos((pi()/2)+g);
end
g=((-3*pi())/2):0.1:0
Ebca=(Ex*cos((pi()/6)+g)^2+Ey*sin((pi()/6)+g)^2+Gamxy*sin((pi()/6)+g)*cos((pi()/6)+g));
Ebcb=Ex*cos(-(pi()/6)+g)^2+Ey*sin(-(pi()/6)+g)^2+Gamxy*sin(-(pi()/6)+g)*cos(-(pi()/6)+g);
Ebcc=Ex*cos((pi()/2)+g)^2+Ey*sin((pi()/2)+g)^2+Gamxy*sin((pi()/2)+g)*cos((pi()/2)+g);

Nick Kavouris 2020-9-24

the code you provided me worked beautifully! thank you for the assistance

David Hill 2020-9-24

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How to plot the values found in a for loop?

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How to plot the values found in a for loop?

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